Skaar made his animation debut in the animated series Hulk and the Agents of S.M.A.S.H. (2013–2015), and his live-action Marvel Cinematic Universe (MCU) debut in She-Hulk: Attorney at Law (2022) by Wil Deusner. Marvel was started in 1939 by Martin Goodman under a number of corporations and imprints but now known as Timely Comics, and by 1951 had generally become known as Atlas Comics. The Marvel era began in 1961, the year that the company launched The Fantastic Four and other superhero titles created by Stan Lee, Jack Kirby, Steve Ditko and many others. The Marvel brand, which had been used over the years, was solidified as the company’s primary brand.

Marvel counts among its characters such well-known superheroes as Spider-Man, Iron Man, the Hulk, Thor, Captain America, Ant-Man, the Wasp, Black Widow, Wolverine, Captain Marvel, Black Panther, Doctor Strange, Ghost Rider, Blade, Daredevil, the Punisher and Deadpool. Superhero teams exist such as the Avengers, the X-Men, the Fantastic Four and the Guardians of the Galaxy as well as supervillains including Doctor Doom, Magneto, Thanos, Loki, Green Goblin, Kingpin, Red Skull, Ultron, the Mandarin, MODOK, Doctor Octopus, Kang, Dormammu, Annihilus and Galactus. Most of Marvel’s fictional characters operate in a single reality known as the Marvel Universe, with most locations mirroring real-life places; many major characters are based in New York City. Additionally, Marvel has published several licensed properties from other companies. This includes Star Wars comics twice from 1977 to 1986 and again since 2015.